[markmark]

Hello,
I've just picked up a Marantz 4230 receiver & Technics sl-d2 turntable.
The receiver has a strange power plug with 2 round pins. Plug has "made in Germany" 250. I will try to upload pictures.



Turntable power plug has what looks to be normal 110v plug with 2 flat pins but has a white plastic plug cover with 6a 250v stamped on it.



I know very little about electronics & don't want to fry anything by doing something dumb.
1. The turntable has a switch for 220-240v or 110-120v. With the switch set for 110-120v, Do I need to change the plug?
2. On the Marantz receiver.... I don't see a voltage switch but I havn't cracked it open yet. The previous owner said the unit works but bulbs are out. Are the bulbs multi-voltage or does the voltage switch take care of that? (will I need 110v bulbs)?
3. Is this a major job or just a matter of flipping a switch & changing a plug?
Thanks for any help,
Mark

[Wayner]

The voltage standard in Europe is 220v, 50 cycle. The Marantz is equipped for that voltage operation. Not sure if the inside will reveal a selector switch or not. I have redone many Marantz receivers, but have never seen a voltage selector switch for 220 (240).

The lamps for the receiver work off of it's power supply and are 8vdc, 200ma. You can use 12vdc, 250ma. if you can't source the right correct rating.

I'd guess the turntable is OK, as that is a standard (but non-polarized) 120 volt plug. I'm pretty sure the Technics has a voltage selector switch under the platter. Take it off and make sure it's set to 120v.

Back to the Marantz, you may need the help of a technician to get this going. There may well be a 120 tap on the transformer, but I'm not sure if it's there (since it is not a U.S. model), where the tap might be or if you need to get a different transformer, or if you are screwed.

Wayner

[markmark]

Thanks Wayner,
I opened up the case & didn't find a voltage switch. I've noticed the model # is 4230(e), e for european?? The ID plate on back says ac 110/120/220/240v so I'm hoping it can be switched over. I was really hoping it would be as easy as flip a switch, change a power cord & done but it doesn't look that way. Inside, the power cords connects to a terminal block. The block has a couple open pins. I don't want to start swapping wire around yet so I'm trying to get access to a step up transformer so I can at least test this unit before waisting much more time or money.

I found the switch on the turntable. I wasn't sure about the replacing the plug.

Thank,
Mark

[Wayner]

What does the terminal block say? For sure you will need a proper 2 prong (polarized) plug, but that would be an easy fix. Tell me what the terminal block says.

Wayner

[markmark]

Doesn't have anything on it.
It looks like this....

[Wayner]

I think the good news is that it could be a "multi-tap input transformer, so there is hope. I'd start searching on google for a manual for a 4230 and see if you can find info on moving jumpers on the terminal block.

I'll look later on if I have some time.

Wayner

[markmark]

Wayner,
I came across a wire diagram.



The wires don't seem to be in the same position & the color code doesn't match what's actually on the terminal block. (???). I don't know if the previous owner tinkered on it or I'm just not reading it right.

[markmark]

OOPS,
Hold on, I found a schematic for European models that match what I have.
I'm trying to get a picture.

[Wayner]

Yes, that is confusing. As I read it, 1 of the brown jumpers goes from yellow to white, the other brown jumper from red to brown, and the 120 volt line to yellow.

Unfortunately, there is no white wire. There is an orange wire, and all of the others are present.

If we are to look at how it is currently wired, we see the yellow and the red jumpered twice. The 2 convience outlets are commoned on the terminal block and fed from the power cord's blue wire, feeding the brown of the transformer. The other yellow wire (on the lower side of the terminal block) is from the green wire.

I'll study it some more.

Wayner

[Wayner]

OK, post the picture when you can.

Wayner

[markmark]

Picture will not upload.
Wayner, can I email it to you?

[Wayner]

For those interested in Mark's voltage problem, here is a photo of the schematic he found, that looks to be the correct one.

 

My proposed solution is to remove jumpers W010 and W011 and relocate them. W011 would go from the orange wire to the brown wire, W011 would go from the yellow wire to the blue wire. The neutral would stay on the brown wire, sharing it with one side of jumper W011 and the 120 volt line side of the plug would get moved from the green wire to the blue wire.

This puts both sets of coils in the primary side of the transformer in parallel, feeding 120 volts to the blue and orange, and going thru the coils to the neutral on the yellow and the brown.

There are 3 secondary windings being fed by the 2 primary windings, the largest one, I'm sure, will be feeding the power amp circuits and the others 2 windings (lower voltage) will be powering smaller boards, lights etc.

Do not wire this until I get word from a friend on the correctness of the new wiring, but I do think we have the solution.

Mark will have to get a new polarized 2 prong cord and the wide blade (neutral) will have to end up on the brown wire. The 120 volt line wire will end up on the blue wire.

Make sense to anyone else?

Wayner

[markmark]

Thanks Wayner 
I can take pictures of other areas on the schematic if it will help.